Thermostat mounting



Feb. 25, 1936. w. H. RADFQRD 2,032,069

` THERMOSTAT MOUNTING Filed Nov. 14, 1932 2 sheets-sheet 1 W/l//am H. Radford INVENTOR.

Feb. 25, 1936. w. n. RADFORD 2,032,069

THERMOSTAT MOUNTING v Filed Nov. 14, 1932 2 Sheets-Sheet 2 W ff) t V N Q) l* f a i@ g? W W l v t [D Y1* y I-l Yi L11 l n o 0 WN E \D 1 I U N v Q., :e f'

INVENTOR.

Wfl/lam H. Radford Patented Feb. 2s, 1936 UNITED STATES lPA'rsrVr oFFlcE THERMOSTAT MOUNTING Application November 14, 1932, Serial No. 642,516

4 Claims. (Cl. 236-34) My invention relates particularly to the means for disposing a thermostat unit in the water system of an internal combustion engine. This application is a continuation in part of my copending application, Serial No. 361,423, filed May 8. 1929.

An object of my invention is to provide a thermostat mounting of such a character that the thermostat can easily be inserted into position and removed therefrom.

Another object of my invention is to provide an inexpensive mounting for a thermostat.

Another object of my invention is to simplify the assembly of a thermostat unit in a cooling system. i

The foregoing and other objects are attained in the embodiment of the invention shown in the drawings, in which:

Description of figures General description of invention In general terms, the construction of my invention comprises a water duct or passage which -connects an engine, such as an internal combustion engine, to the header or top tank of a radiator employed in combination with the engine. The passage is-formed with a chamber portion adapted to receive a thermostat unit to be mounted in the chamber; and the chamber is positioned adjacent the end of a detachably secured pipe forming a. part of the passage. Thus, the

thermostat unit can be readily inserted at the point of connection of the pipe', and it can be maintained in place by virtue of said connection.

A restricted portion or abutment is formed in the passage, against which abutment the thermostat unit is held preferably'by means of a spring. The

spring is preferred, because it will eiect selfejection Vof the thermostat Kunit whenlit is desired to disconnect the pipe for removal of the unit.

for a more detailed description of my invention. Figs. 1 through 3 illustrate the invention as it is incorporated in a tractor. Ihis vehicle includes an internal combustion engine 6 having a water cooling radiator '1. The lower tank or header 8 of the radiator connects through a conduit 9 with a water pump I I on the shaft, to which a cooling fan I2 is fastened. Water discharged from the engine 6 passes through a4 pipe I3 detachably secured to the engine by screws It, and enters a lo chamber I5 in the upper radiator tank or header I1. Pipe I3 and chamber I5 thus form a water conducting passage, Connecting the engine with the radiator; chamber I5 being in said passage.

In accordance with my invention, the chamber I5 is preferably pierced on one side by an aperture IB disposed opposite the upper wall I9 of the header. A thermostat unit, comprising a cage Vgenerally designated as 2|, is situated within chamber I5. The unit includes a collar 22 of 20 such a diameter as to pass freely through aperture I8, and on which are mounted uprights 23. Cross members 24 span the uprights and conne an expansible metal bellows 26. Secured to the bellows and moved thereby is a valve 2l adapted 25 to seat on the walls of a port 28 formed in collar 22. When the water, being pumped to the radiator by pump Il, rises in temperature, the bellows 26 expands and dislodges valve 21 from its seat permitting circulation through the chamber I5 and throughout the cooling system of the engine B. Upon a drop in temperature of the cooling water below a predetermined amount, the bellows 26 contracts thereby seating valve 2l and diminishing or stopping completely the 35 circulation of Water in the cooling system.

In order to mount the thermostat unit within chamber I5, I preferably situate the collar 22 .lust within the aperture I8 and oppose the collar with a coil spring 29 contacting against a spring 40 Vseat 3i provided in the top wall I9 of the chamber I5. The spring 29 tends to urge the thermostat cage out of the chamber'l. In order to maintain the thermostat cage in proper position, I form pipe I ii with an upper anged end 22 4f; which is detachably secured to the header I9 by screws 23. The inner diameter of pipe I2 adjacent the header ISI is preferably suiiiciently small to provide an abutment against which collar 22 of the thermostat cage is held by the spring. It 50 is thus seen that spring 2S lnges the collar against the abutment ange 32 and retains the thermostat unit in position. Upon screws 33 and I4 being removed and pipe I3 retracted, the spring 29 forces the thermostat unit out of chamber I5 55 same as that described with respect to Figs. 1

through 3; it includes the cage which supports collar 422, expansibie bellows 426 and valve 421 movable by the beilows. However, in contradistinction to the construction illustrated in Figs.

- 1 through 3, valve .21 has a fiat planar surface chamber 43|.

adapted to engage the under surface oi collar 422, which under surface forms a seat for valve 421.

A small aperture 428 is formed in Valve 421 to allow a slight ow of water to the bellows 426. Thus, bellows 426 can expand and contract by virtue of direct contact with water from the engine, instead of by heat conductivity. This makes I for more responsive action than is the case with respect to the modifications of Figs. 1 through 3. Instead of mounting the thermostat unit in a chamber formed in the upper header or tank of the radiator, as is the case with respect te the previously described modification, the thermostat unit is positioned in chamber 43| formed at the end of pipe 432 adjacent engine 433. Pipe 432 is detachably secured, at one end, by screws 434 to the upper header or tank 436 forming part of radiator 431. At its opposite end, pipe 432 is detachably secured by screws 438 to outlet 439, which communicates with the water jacket of engine 433.

From the preceding description, it is apparent that outlet 439, pipe 432 including chamber 43|- and header 436 form a passage for the conduc-` tion of water from the engine to the radiator;

andthatthe thermostat unit is mounted in chamber 43| of the passage. Collar 422 of the thermostat unit lits aperture 44| in the lower end of chamber 43| and it is held against the top 442 of outlet 439, by means of spring 443.

Top 442 oi outlet 439, as can be seen from Fig. 4,-

Conclusion Iriboth the described modifications, it 'can be seen that because the thermostatunit is positioned adjacent the point of connection of the vdetachably secured pipe, a simple and compact construction obtains, which construction permits facile installation or removal of the unit. Because of the compactness and simplicity 4of the thermostat unit perse, installation and removal thereof is also enhanced, inasmuch as it is unnecessary to connect or disconnect elements which make up part of the temperature control means.

' c-f water from said engine to said radiator; said passage including a plurality of hollow members detachably secured togetherln abutting reiationship, the wall of one of said members adjacent the point of connection having a portion projectng inwardly of said passage to provide an abutment; a thermostat unit in another of said.

members and having a valve seat adapted to be thrust against said abutment; and a coiled spring compressed in said anotherof said members and bearing against said valve seat to hold resiliently said valve seat against said abutment.

3. A cooling system for an internal combustion engine comprising a radiator, a passagefrom said engine to said radiator, a second passage from said engine to said radiator, said passages cooperating to provide for circulation of cooling iluid between said engine and said radiator, one of said passages having a chamber therein and including a. detachably secured duct member, the chamber being positioned adjacent a point of connection of said duct member, a thermostat control unit positioned-in said chamber adjacent said point of connection of said duct member and including a valve seat member extending across said one passage, and means independent of the securing means for said duct member for holding said valve. seat member against anannular abutmentin said one passage. A I

4. A cooling system-for an internal combustion engine comprising a radiator; a passage from said engine to said radiator; a second passage from said engine to said radiator; said passages cooperating to provide for circulation of cooling fluid between said engine and said radiator; one of said passages having a chamber therein and includingV a detachably secured duct member; the chamber being positioned adjacent a point of connection of said duct member; a. thermostat control unit in said chamber andcomprising a valve seatvrnember extending across said one passage adjacent the point of connection of said duct member, a thermostat,` means supporting said thermostat on said valve seat member,

. a valve adapted to seat en said valve seat member, and a valve stem connecting the valve to s'aid thermostat; and means, independent of the securing means for said duct member, engaging said valve seat member for retaining said thermostat unit in p-osition, with said valve seat member against an annularabutment in said oneA passage.

WILLIAM H. RADFORD. 

